Metallic ceiling-plate



(No Madel.)

LL. SMHNDORPEL` MBTALLIG GBILING PLATE. No. 489,236. Patented Jan. 3, 1893.

UNITED STATES PATENT OFFICEz LONGLEY LEWIS SAGENDORPI'I, OF PHILADELPl-IIA, PENNSYLVANIA, AS-

SIGNOR OF ONE-HALF TO CHARLES N. HARDER, OF PHILMONT, NEW

YORK.

METALLIC CElLlNG-PLATE.

SPEGIFICATION forming part of Letters Patent No. 489,236, dated January 3, 1893.

Application filed September '7, 1892. erial No. 445.240. (No model.)

T0 aZZ wwm it may conccrn:

Be it known that I, LONGLEY LEWIS SAGEN- DORPH, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Metallic Ceiling-Plates, of which the following is a specification, reference being had to the accompanying drawings.

The object of my invention, and advantages arisin g therefrom, will be apparent from the detailed description hereinafter given.

` In the accompanying drawingsz-Figure l, is a plan view of a section of ceiling, showing one of my improved plates in position. Fig. 2, is asimilar view, on an enlarged scale, taken lat the juncture of four ceiling plates embodying my invention. Fig. 3, is a longitudinal section taken on the dotted line 3, 3, of Fig. 2.

Fg. 4, is a transverse section taken on dotted line 4, 4, of Fig. 2, on a still enlarged scale. Fig. `5, is a section on dotted line 5, 5, Fig. 2.

My invention consists of a metallic plate A, (embossed or plain) having a marginal raised molding a, which preferably extends continuously around said plate in an unbroken line, said molding terminating in an interlocking fiange b; that is, the fiange on one side of the plate is designed to interlock with a corresponding flange on the adjacent plate, in the manner and for the purposes hereinafter set forth.

The primary objects of my present invention are, first: to provide a tlange for each side of a plate, such as above described, which will fit into or engage with the fiange on an adjacent plate, in such a manner as to render the seam or stile thus formed, dust-proof; second, to so interlock said flanges as that they will engage and mutually assist to support each other, and provide for expansion and contraction; and third, to so unite said fianges as that all rough edges shall be hidden from view, and thus add to the beautifying effect of the entire ceiling. With these objects in in view, I preferably form the flanges b dovetailed in cross-section, as shown, the outer and downwardly projecting portion 172, of the top fiange resting along its edge at the point of jnncture between the base of the underlyfing fiange and its molding a, as more clearly shown in Fig. 4. This construction accomplishes a two-fold object, viz: to securely lock the plates together, and at the same time hide the terminal edge of lap bz, from view, as shown in Fig. 2.

In the top of each flange b, is formed two continuous ribs or beads D, which are preferably ot' a serpentine Outline, as shown, the one bead intersecting with the other bead at the points cl. These beads are formed in the top face of said flanges inward from their offset, leaving the blank Shoulders dz, at each side thereof, as shown.

lVith a seam or stile formed in the manner just described, it is impossible for any dust or dirt to work through between the fianges, as the two beads D will effectually clog and stop the same. These beads also add to the rigidity of the seam; and, in connect-ion with the fiat Shoulders C12, on a plane with the base of said beads, also assist to prevent warping.

In the formation of my improved plate, it is preferred that the downwardly projecting portion D2, on the flange at one side and end of each plate, be not bent inward until after the said flanges are placed over the dovetailed fianges of the adj acent plates, at which time said portion (72 is bent inward with a suitable former or tongs, thus securely and firrnly looking the plates together,--the beads D in top flange engagi'ng over the corresponding beads in the lower fiange.

At the point where the corners of four plates meet,I employ a metallic rosette E, having radiating arms e, the latter being provided with beads D', corresponding to the beads D on that portion of the fianges which said arms overlap. The arms c are preferably provided With the downwardly projecting flanges 82, which latter are compressed over and around the dovetailed fianges of the underlying plates, as shown in Fig. 5. By this means the tagged edges of the plates, at the meeting corners thereof, are completely hidden from view; and, the arms of the rosette, being of the same outline configuration as the flanges on the plates, are not readily distinguished therefrom, especially after having been properly painted and decorated. The rosettes at the corners of the plates are retained to place by means of a IOO nail 01' screw h secured to a block H, the latter being securely fastened to the joist or ceilin g strips.

It Will be seen that by reason of the dovetailed interlocking fianges on the plates, I am enabled'to dispense with the continuous furring strips now commonly used in putting up metallic ceilings, and only need' employ the blocks H at the overlapping corners of said plates.,V I also avoid the necessity of nailing through the fianges. The rosettes are so em-v bossed as thatfthe heads of the nails passed therethrough are hardly perceptible, especially after decoration.

The various advantages arising from my in- Vention have been partially7 set forth, and need not be re-enumerated- The Various features of my invention are designed to cheapen the cost of constructing the ceiling by a saving of time and material. The plates can be readily taken down and used in another room or building, without damage 'to said plates. The construction is such as to completely hide all broken or ragged edges of material, thus producingan artistic, symmetrical and pleasing effect to the eye. All the fire-proof qualities found in any metallic ceil ing are attained by myinvention, with the additional quality of its being dust-proof.

I am aware that it is not new, broadly, to emboss a metallic plate with a continuous raised molding, as that featurev is old and Well known in bird-cage bottoms, waiters and various other articles; but,

What I claim as new and desire to secure by Letters Patent is:-

1. A metallic ceiling plate having acontinuous raised molding terniinating in fianges of a dove-tailed configuration incross-section, substantially as set forth.

2. A metallic ceiling plate having side in- 1 terlocking fianges, the latter having raised beads D of a serpentine Outline intersecting and crossing each other as shown, said beads on one plate being adapted to overlap corresponding beads on an adjaeent plate, substantially as set forth.

3. lA metallic ceiling plate having a continuous raised molding terminating in interlocking fianges, b b2, the top face of portion being provided with raised beads, substantially as specified.

4. A metallic ceiling consisting of plates having a continuous raised molding terminating in interlocking fianges, the flange at one side of a plate interlocking with the flange on the side of the adjacent plate, the corners of said plates being covered with rosettes having arms e and interlocking flanges 82, substantially as set forth.

5. A metallic cel'ling plate havinginterlocking fiangesb With beads D formed thereonz in combination with a metallic rosette having arms e adapted to engage with said flanges, said arms having beads D' on their top face corresponding in Outline with beads D, substantially as set forth.

'6. A metallic ceiling plate having a continuous raised molding a terminating in fianges b, the latter having on their top face the beads D, and a continuous flat portion or shoulder d2 at each side of said beads, the flange thus formed being adapted to overlap acorrespondingly formed flange on an adj acent plate, substantially as set forth.

7. A metallic ceiling made up of plates A, each plate having a continuous raised molding terminating in a flange interlocking with a like flange on the adjacent plate, With a single block I-I beneath the corners thereof, and a rosette over the corners of the plates, the latter being connectedtorrsaid block, snbstan-V o tially as set forth.

LONGLEY LEWIS SAGENDORPH.

Witnesess:

SAMUEL D. HAGNER, Jos. MCCORKELL. 

